Grok-3 Mini vs Grok-4 Heavy
xAI vs xAI — benchmarks, pricing, and capabilities side by side.
- •Grok-4 Heavy has the higher intelligence index (89.3 vs 85.9)
| Grok-3 Mini | Grok-4 Heavy | |
|---|---|---|
| Intelligence index | 85.9 | 89.3 |
| Developer | xAI | xAI |
| Type | Multimodal | Multimodal |
| Access | API only | API only |
| Context window | 128,000 tokens | — |
| Input price | $0.30 / 1M | — |
| Output price | $0.50 / 1M | — |
| Speed | 100 tok/s | — |
| Released | February 17, 2025 | July 9, 2025 |
| Parameters | — | — |
| Input modalities | — | — |
| Output modalities | — | — |
Shared benchmarks
Grok-3 Mini
Grok-4 Heavy
AIME 2025
90.8
100
GPQA Diamond
84
88.4
LiveCodeBench
80.4
79.4